package chapter10.Demo1;

import java.sql.*;
import java.util.Scanner;

public class Demo1 {
    public static void main(String[] args) throws SQLException{
        /**
         * 模拟添加用户业务
         */
        Statement stmt = null;
        ResultSet rs = null;
        Connection coon = null;
        try{
            // 1.注册数据库驱动
            Class.forName("com.mysql.cj.jdbc.Driver");
            // 2.通过DriverManger获取数据库连接
            String url = "jdbc:mysql://localhost:3306/jdbc?sereverTimezone=GMT%2B8&useSSL=false";
            String username = "root";//数据库账户
            String password = "123456";
            coon  = DriverManager.getConnection(url,username,password);
            // 3. 通过Connection对象获取Statement对象
            stmt = coon.createStatement();
            // 4. 使用Statement执行SQL语句
            /**
             * 终端用户输入用户名 密码 邮箱
             * 将终端用户的输入添加到数据库
             */
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入用户姓名:");
            String un = sc.next();
            System.out.println("请输入用户密码:");
            String pd = sc.next();
            System.out.println("请输入用户邮箱:");
            String em = sc.next();
            String insertSQL = "insert into users(name,password,email)values(?,?,?)";
            PreparedStatement pm = coon.prepareStatement(insertSQL);//对插入sql进行了处理
            pm.setString(1,un);//将SQL第一个？号绑定成un的值
            pm.setString(2,pd);//将SQL第二个？号绑定成un的值
            pm.setString(3,em);//将SQL第三个？号绑定成un的值
            pm.executeUpdate();



            String sql = "select * from users";
            rs = stmt.executeQuery(sql);
            //5. 显示结果集合
            System.out.println("id   |    name    |    password   |   email    |   birthday");
            while (rs.next()){
                int id = rs.getInt("id");
                String name = rs.getString("name");
                String psw = rs.getString("password");
                String email = rs.getString("email");
                Date birthhday = rs.getDate("birthday");
                System.out.println(id + "  |  "+  name  + "  |  "+ psw +"  |  "+   email   +"  |   "+birthhday);
            }
        }catch (ClassNotFoundException e){
            e.printStackTrace();
        }finally {
            // 6.回收数据库资源
            if (rs != null){
                try {
                    rs.close();
                }catch (SQLException e){
                    e.printStackTrace();
                }
                rs = null;
            }
            if (stmt !=null){
                try{
                    stmt.close();
                }catch (SQLException e){
                    e.printStackTrace();
                }
                stmt = null;
            }
            if (coon != null){
                try{
                    coon.close();
                }catch (SQLException e){
                    e.printStackTrace();
                }
                coon = null;
            }
        }
    }
}